130 lines
2.5 KiB
Elixir
130 lines
2.5 KiB
Elixir
defmodule Chiya.Channels do
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@moduledoc """
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The Channels context.
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"""
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import Ecto.Query, warn: false
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alias Chiya.Repo
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alias Chiya.Channels.Channel
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alias Chiya.Notes.Note
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@preloads [:notes]
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@public_preloads [
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notes: {
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from(n in Note,
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where: not is_nil(n.published_at),
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order_by: [desc: n.published_at]
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),
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Chiya.Notes.note_preloads()
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}
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]
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@doc """
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Returns the list of channels.
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## Examples
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iex> list_channels()
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[%Channel{}, ...]
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"""
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def list_channels do
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Channel
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|> order_by(desc: :visibility)
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|> Repo.all()
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end
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def preload_channel(channel), do: Repo.preload(channel, @preloads)
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def preload_channel_public(channel), do: Repo.preload(channel, @public_preloads)
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@doc """
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Gets a single channel.
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Raises `Ecto.NoResultsError` if the Channel does not exist.
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## Examples
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iex> get_channel!(123)
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%Channel{}
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iex> get_channel!(456)
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** (Ecto.NoResultsError)
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"""
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def get_channel!(id), do: Repo.get!(Channel, id)
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@doc """
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Gets a single channel with all associated entities preloaded.
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"""
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def get_channel_preloaded!(id), do: Repo.get!(Channel, id) |> preload_channel()
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@doc """
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Gets a single channel by its slug with all associated entities preloaded.
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"""
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def get_channel_by_slug!(slug), do: Repo.get_by!(Channel, slug: slug)
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@doc """
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Creates a channel.
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## Examples
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iex> create_channel(%{field: value})
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{:ok, %Channel{}}
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iex> create_channel(%{field: bad_value})
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{:error, %Ecto.Changeset{}}
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"""
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def create_channel(attrs \\ %{}) do
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%Channel{}
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|> Channel.changeset(attrs)
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|> Repo.insert()
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end
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@doc """
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Updates a channel.
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## Examples
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iex> update_channel(channel, %{field: new_value})
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{:ok, %Channel{}}
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iex> update_channel(channel, %{field: bad_value})
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{:error, %Ecto.Changeset{}}
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"""
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def update_channel(%Channel{} = channel, attrs) do
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channel
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|> Channel.changeset(attrs)
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|> Repo.update()
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end
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@doc """
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Deletes a channel.
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## Examples
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iex> delete_channel(channel)
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{:ok, %Channel{}}
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iex> delete_channel(channel)
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{:error, %Ecto.Changeset{}}
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"""
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def delete_channel(%Channel{} = channel) do
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Repo.delete(channel)
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end
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@doc """
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Returns an `%Ecto.Changeset{}` for tracking channel changes.
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## Examples
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iex> change_channel(channel)
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%Ecto.Changeset{data: %Channel{}}
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"""
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def change_channel(%Channel{} = channel, attrs \\ %{}) do
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Channel.changeset(channel, attrs)
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end
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end
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